c-decl.c (grokdeclarator): Support flexible array members.

        * c-decl.c (grokdeclarator): Support flexible array members.
        Use open-ended ranges for these and zero-length arrays.
        * c-typeck.c (push_init_level): Validate the context of
        initialization of a zero-length array.
        * tree.c (int_fits_type_p): Be prepared for missing bounds.
        * varasm.c (array_size_for_constructor): New.
        (output_constructor): Use it for arrays of unspecified length.
        * extend.texi (Zero Length): Mention C99 flexible array members.
        Document initialization in a top-level struct as valid.

From-SVN: r37576

1 files changed, 3 insertions, 1 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index 7652052..7910449 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -4186,7 +4186,9 @@ int_fits_type_p (c, type)
 {
   /* If the bounds of the type are integers, we can check ourselves.
      Otherwise,. use force_fit_type, which checks against the precision.  */
-  if (TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST
+  if (TYPE_MAX_VALUE (type) != NULL_TREE
+      && TYPE_MIN_VALUE (type) != NULL_TREE
+      && TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST
       && TREE_CODE (TYPE_MIN_VALUE (type)) == INTEGER_CST)
     {
       if (TREE_UNSIGNED (type))